Question

Find the Molar Mass of the following substances
1. NaOH
2. Fe2(SO4)3

Answer 1

1)Na=23

O=16

H=1

Molar mass =$=23+16+1$ =40

2)Fe=55.8

S=32

O=16

Molar mass=$( 55.8\times2 )+(32\times2)+ ((16\times4)\times 3)$ =399.6